Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['1963', 'J', '5073', 'i', 'i', '3313']

1963, 10, 5073, 9, 9, 3313